Re: [Gopchop-devel] Uses for gopchop?

[Tomi O. <tom...@ik...>]

Friday Apr 29 20:28:07 +0300 2005 Matthieu Weber <mw...@mi...> wrot=
e:
>=20
> In Finland, the public TV channels use separate streams for
> transporting the subtitles (most of the foreign shows are subtitled,
> sometimes in Finnish *and* Swedish, each language having its own stream=
),
> and the DVB subtitles are nothing like DVD ones. So unless someone
> writes a converter between DVB-subs and DVD-subs, I'll stick to TS
> format (the overhead compared to PS is quite small).

By public tv you mean YLE(isradio) channels -- the commercial (still
public? ;) have subtitles burnt to the pictures.

As the YLE channels don't have commercials, editing such files (TS
recordings) could just be handled by cutting original TS files
from suitable multiblies of 188 bytes, then demux the material
with ProjectX (projectx.sourceforge.net) and finally use `wine IfoEdit.ex=
e'
to create DVD image  of it (if TS had video, audio, and subtitle streams
those are available after ProjectX demux). My helper=20
http://www.iki.fi/too/sw/m2vmp2cut/simpletscut.pl can be used to do such
cutting...=20

I wrote an email to some of the lists I'm on (probably linux-dvb) where I
described the steps required to get ready-to-burn dvd (with subtitles)
from mpeg-ts file.


I have 4 such TS recordings laying on my HD waiting for cutting -- and so
far I don't know any other way to do the job. It just takes some iteratio=
ns
with simpletscut and ProjectX to find suitable cutpoints...

With commercial channels, my current cutting procedure is as follows:

First demux .TS file with ProjectX. Then use lve (lvempeg.sourceforge.net=
)
to find cutpoints. Then run m2vmp2cut(*) to create dvd-authorable .mpg
-image and finally dvdauthor and growisofs it.


(*) m2vmp2cut (http://www.iki.fi/too/sw/m2vmp2cut/is a tool I wrote to ma=
ke
frame-accurate cutting to mpeg files. It works only with elementary strea=
ms
where video is in PAL mpeg2 format and audio in mp2 format (that is just
what finnish DVB-T streams are after demuxed using ProjectX). My plan is =
to
add DVB subtitle support to it in (far) future...

... Interesting thing here is that If I demux my TS recordings that have
subtitle stream included with ProjectX, I get subtitles to separate file
named <filename.sup>. Now, only one unix tool I know of can display the
subtitles in that file -- and that is ... gtkspu!. If I just run
`gtkspu <filename.sup> 1', `gtkspu <filename.sup> 2' and so on, I can
see all the graphic of these subtitles. I'm going to investigate how
gtkspu does't it work to get further with the planned subtitle support
mentioned above.

I suggest everyone playing with mpeg files recorded from somewhere check
out ProjecX -- it can 'repair' many of the problems there might be in
such files..

>=20
> Matthieu
> --=20
>  (~._.~)        Matthieu Weber - Universit=E9 de Jyv=E4skyl=E4         =
(~._.~)


Tomi